Poor customer service

I received a phone call about 2 or 3 weeks ago from Vodacom, informing that they are replacing the data I'm currently getting with a better option and I will be paying less, I was very hesitant about this and I told lady I don't want a new contract but if you just amending my current contract then I'll go for the option. The lady ensured me no this is not a new contract they just amending my contracts only the data will be adjusted your number will remain the same. Something was just not right about this call, however I agreed to the amendment and then the lady still tell they going to send me the a new sim card which I need to use via courier. So then I got the sim an checked my profile on the Vodacom app and saw but a new contract was added and I didn't agreed to that. I was phoning customer service they referred me to after sales. Phoned after sales for 2 days was holding the line for more than 30 minutes every time I called. Eventually I got hold of a consultant by after sales on 23/11/2022 and whe took my details because I don't want this new contract and they need to cancel it, she confirmed my request has been logged and within 24 - 48 hours I will get a response regarding my cancellation or I need to follow up again. On 02/12/2022, I phoned to follow up, I didn't get any answer by after sales and then I called customer service and then this consultant checked the record and can see a note of my last call she will log my case with back office management who will respond to me within 48 hours. Its almost week since my second call and I still didn't get any feedback. Can someone get back to me as this contract need to be cancelled immediately.